Andrew Bynum (knees) did "serious work" on an elliptical on Tuesday. Bynum will be limited to low-impact conditioning drills while he's sidelined, and he appears committed to remaining in shape and getting back on the court as soon as possible. As of now, he's tentatively expected to be ready for opening night, but as we've seen in the past, Bynum's knees are anything but predictable. He remains a top-shelf fantasy center when healthy.